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kicyunya [14]
4 years ago
5

Which diagram shows a light ray moving from a more dense into a less dense medium? A black horizontal line intersected at right

angles by a dotted orange line labeled Normal. An arrow strikes the intersection point from above and continues at a shallower angle relative to the horizontal line below. A black horizontal line intersected at right angles by a dotted orange line labeled Normal. An arrow strikes the intersection point from above and continues at the same angle relative to the horizontal line above. A black horizontal line intersected at right angles by a dotted orange line labeled Normal. An arrow strikes the intersection point from above and continues at a steeper angle relative to the horizontal line below.
Physics
2 answers:
nalin [4]4 years ago
4 0

Answer:

its the first one :)

Explanation:

Is it the one with the three pictures!?

mina [271]4 years ago
3 0

Answer:

its A

Explanation:

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What does <br>the length of a lens system depend on?​
AleksandrR [38]

Answer:

focal length depends on the radius of curvature, the refractive index of lens material, and the medium's refractive index in which the lens is placed

4 0
3 years ago
Why do you think modern America needs so much energy to function?
MariettaO [177]

Answer:

electricity consumption in United states was about 3.9 trillion kilolwatthours(kWh) in 2019 electricity is an essential part of morden life

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3 years ago
An electric heater is rated at 1500 W. If the heater is rated as 80% efficient, calculate the output
Nitella [24]

Answer:

Power = 1200 [W].

Explanation:

The efficiency of an electrical equipment is defined as the relationship between the power realized, over the power that is consumed. For this case, they give us the data of consumed power and efficiency in this way we can calculate the power that the equipment performs.

Efficency=\frac{Power_{done}}{P_{consumed}}\\0.8 = \frac{Power_{done}}{1500}  \\Power_{done}=1500*0.8\\Power_{done} = 1200 [W]

This means that of the 1500 [W], 1200 [W] are actually used to get the job done. This is established by means of the first law of thermodynamics.

7 0
3 years ago
12. Prove that v' = u? + 2as.​
pashok25 [27]
<h3><u>Correction</u><u>:</u><u>-</u></h3>

Prove that v² = u² + 2as .

<h3><u>Solution</u><u>:</u><u>-</u></h3>

From first equation of motion,

v = u + at

=> at = v - u

=> t = v - u / a

From the second equation of motion, we have

s = ut + 1/2at²

Putting the value of t in above equation , we get:

s = u ( v - u /a ) + 1/2 a ( v - u/a )²

s = uv - u² / a + a( v² + u² - 2uv / 2a²)

s = uv - u² / a + v² + u² - 2uv / 2a

s = 2uv - 2u² + v² + u² - 2uv / 2a

2as = v² - u²

5 0
3 years ago
Read 2 more answers
A cube has height of 3cm. What is the volume of the cube?
Arisa [49]

Answer:

27cm^{3}

Explanation:

The formula to find the volume of a cube is Volume=height cubed(or to the power of 3) so you would replace height with 3cm and get the equation Volume= 3 to the power of 3. So 3 x 3 x 3 = 27. So your answer would be:

27cm^{3}

5 0
3 years ago
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